说明：  在ns2中仿真网络结构，在OTCL编码中，代理节点的协议代理分别设置为tcp/Reno、TCP/Newreno、TCP/Sack1和tcp/Vegas，来模拟这四种算法。附有仿真结果和实验报告。
(Network structure in the simulation in ns2, in OTCL coding, the protocol proxy agent node were set to tcp/Reno, TCP/Newreno, TCP/Sack1 and tcp/Vegas, to simulate the four algorithms. With simulation results and experimental reports.)